Towel rack



FIG. 1 is a perspective view of a towel rack showing my new design;

FIG. 2 is a front elevational view thereof, the rear being unornamented;

FIG. 3 is a side elevational view taken from the left of FIG. 1, theside opposite being a mirror image;

FIG. 4 is a top plan view thereof.

The ornamental design for a towel rack, as shown and described.